Morphology-dependent electrochemical properties of cobalt-based metal organic frameworks for supercapacitor electrode materials

Ramachandran, Rajendran1,2; Zhao, Changhui1,2; Luo, Dan1; Wang, Kai1,2; Wang, Fei1,2,3

2018-03-20

10.1016/j.electacta.2018.02.074

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

The formation of cobalt metal organic frameworks (Co-MOFs) in different solvents and mixture is studied systematically through solvothermal method. The synthesized Co-MOFs are characterized with X-ray diffraction, Field emission scanning electron microscope and Brunauer-Emmett-Teller surface analyzer to know about its crystal nature, morphology and porosity, respectively. Based on the obtained results, a possible formation mechanism of Co-MOFs has been described with respect to nucleation rate and pH. The electrochemical properties of as prepared Co-MOFs are studied in 3 M KOH for electrode material of supercapacitors. A maximum specific capacitance of 958.1 Fg(-1) is achieved for Co-MOF/D-E (Co-MOF synthesized in DMF/Ethanol) at a current density of 2 Ag-1. Simultaneously, the capacitance retention is maintained as high as 92.3%, even after 3000 cycles. The present study demonstrates that synthesis of Co-MOF with large surface area and micropore volume could be possible using DMF/EtOH mixture solvent. The hybrid structure of nanoneedles with sharp edge nanorods offer more active sites for electrochemical reaction and ensure a higher charge storage capacity than other synthesized Co-MOFs in this work. (C) 2018 Elsevier Ltd. All rights reserved.

Co-MOF Specific capacitance BET surface area Micropores Nucleation rate

SCI ; EI

英语

第一 ; 通讯

Guangdong Special Support Program[2015TQ01X555]

Electrochemistry

Electrochemistry

WOS:000427382500020

PERGAMON-ELSEVIER SCIENCE LTD

20180804825737

Capacitance ; Cobalt ; Crystalline materials ; Electrochemical properties ; Microporosity ; Mixtures ; Nanorods ; Nucleation ; Organometallics ; Potassium hydroxide ; Scanning electron microscopy ; Supercapacitor ; X ray diffraction

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Shenzhen Key Lab 3rd Generat Semicond Devices, Shenzhen 518055, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Transducer Technol, Shanghai 200050, Peoples R China

Ramachandran, Rajendran,Zhao, Changhui,Luo, Dan,et al. Morphology-dependent electrochemical properties of cobalt-based metal organic frameworks for supercapacitor electrode materials[J]. ELECTROCHIMICA ACTA,2018,267:170-180.

Ramachandran, Rajendran,Zhao, Changhui,Luo, Dan,Wang, Kai,&Wang, Fei.(2018).Morphology-dependent electrochemical properties of cobalt-based metal organic frameworks for supercapacitor electrode materials.ELECTROCHIMICA ACTA,267,170-180.

Ramachandran, Rajendran,et al."Morphology-dependent electrochemical properties of cobalt-based metal organic frameworks for supercapacitor electrode materials".ELECTROCHIMICA ACTA 267(2018):170-180.